<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Test01</title>
</head>
<body>
<script type="text/javascript">
    let num01 = 0o11;
    let num02 = 0b111;
    let num03 = 0xFF;

    let num04 = Number('0o11');
    let num05 = Number('0b111');
    let num06 = Number('0xFF');

    console.log(num01);
    console.log(num02);
    console.log(num03);

    console.log(num04);
    console.log(num05);
    console.log(num06);

    console.log(num01 + num02 + num03);
</script>
</body>
</html>